package cn.tedu.jdbc;

import java.sql.*;
import java.util.Scanner;

/**
 * JDBC执行DML语句：update
 * 修改密码功能
 *
 */
public class JDBCDemo2 {
    public static void main(String[] args) throws ClassNotFoundException, SQLException {
        Class.forName("com.mysql.cj.jdbc.Driver");
        Connection connection = DriverManager.getConnection(
          "jdbc:mysql://localhost:3308/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
          "root",
          "123456"
        );
        Statement statement = connection.createStatement();
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入用户名");
        String username = scanner.nextLine();
        System.out.println("输入新密码");
        String password = scanner.nextLine();
        String sql = "UPDATE userinfo SET password='"+password+"' WHERE username='"+username+"'";
        int i = statement.executeUpdate(sql);
        if (i>0){
            System.out.println("密码修改成功");
        }else {
            System.out.println("用户名不存在");
        }
        connection.close();

    }
}
